PAX Chemistry and Physical Science Flashcards
6 cards from real PAX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 PAX Chemistry and Physical Science flashcards as text
What is the speed of light in a vacuum approximately equal to?
Answer: 300,000 km/s
The speed of light in a vacuum is approximately 300,000 km/s (3 × 10⁸ m/s).
Which of the following is an example of a mixture?
Answer: Saltwater solution
Saltwater is a homogeneous mixture where salt is dissolved in water; both components retain their chemical properties.
What is the unit of electric current?
Answer: Ampere
The ampere (amp) is the SI unit of electric current, measuring the flow of electric charge.
What type of energy does a moving object possess?
Answer: Kinetic energy
Kinetic energy is the energy an object has due to its motion; it depends on the object's mass and velocity.
Which of the following has the lowest pH?
Answer: Orange juice (pH 3.5)
The lower the pH number, the more acidic the substance; orange juice at pH 3.5 is the most acidic option.
What happens to the volume of a gas when temperature increases at constant pressure (Charles's Law)?
Answer: Volume increases
According to Charles's Law, volume is directly proportional to temperature at constant pressure, so volume increases as temperature rises.
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